Organic And Inorganic Phosphorus
Mostrando 25-36 de 61 artigos, teses e dissertações.
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25. Avaliação e critérios de eficiência nos processos de tratamento de fluido de corte por eletroflotação / Evaluation criteri and efficiency in the procedures for treatment of fluid cutting by eletroflotation
In the machining process cutting fluids are used to facilitate the manufacture of metal parts, which has resulted in problems of various orders, ranging from the generation of harmful effects on the desktop to the aggression of the environment with their improper disposal. The cutting fluids are composed of oils and minerals, synthetic solutions and water, c
Publicado em: 2008
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26. Utilização de ostra e macroalga como biofiltro para efluentes de cultivo de camarão marinho
The efficiency of an integrated treatment system to improve the water quality from shrimp pond was assessed laboratory-scale by using sedimentation, oyster filtration and macroalgal absorption (trial 1), and the evaluation of oysters and macroalgae densities in effluent treatment of autotrophic and heterotrophic shrimp culture systems (trial 2). Native speci
Publicado em: 2008
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27. Dinâmica do fósforo em latossolo do cerrado sob sistema de integração lavoura-pecuária
The integration of crop-livestock systems (ILP) is one of the alternatives to recover the fertility of soils under degraded pastures in the Cerrado region. This system has positive effects on soil fertility and quality, increasing organic carbon contents and soil biological activity, thus requiring a new characterization of soil fertility by identifying soil
Publicado em: 2008
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28. Geoquímica de fósforo como indicadora da qualidade ambiental e dos processos estuarinos do Rio Jaguaribe - costa nordeste oriental brasileira
Phosphorus geochemistry as a proxy of environmental estuarine processes at the Jaguaribe River, Northeastern Brazil. Sedimentation of different phosphorus geochemical fractions can characterize the natural or anthropogenic processes dominant in the watershed. Selective chemical extraction of different phosphorus geochemical forms in estuarine sediments showe
Química Nova. Publicado em: 2007-10
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29. Estudo das diferentes formas de fósforo nas águas da plataforma continental do Amazonas
Hydrological samples were collected on the continental shelf of the Amazon river to determine particulate organic and inorganic matter, dissolved organic phosphorus (DOP), phosphate, total particulate phosphorus (TPP), chlorophyll a, temperature, salinity, pH, water transparency, dissolved oxygen (DO) and saturation rate. The objective was to study the forms
Química Nova. Publicado em: 2007-06
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30. Organic mineral in diet of foals / Minerais orgânicos na alimentação de potros
The aim of this study was to evaluate the effects of mineral organic in the diet of foals, evaluating the bone mineral deposit of calcium and phosphorus, throughout biopsy and bone mineral density, measures of growing was also did measuring height withers and croup, thoracic circumference, knee, cannon and weight gain. Ten foals which approximated 10 and 13
Publicado em: 2007
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31. Caracterização, decomposição e biodisponibilidade de nitrogênio e fósforo de materiais orgânicos de origem animal e vegetal / Characterization, decomposition and mineralization of nitrogen and phosphorus of organic materials from animals and plants
This work presents results of a set of experiments carried out under laboratory, green house and field conditions regarding to the chemical and biochemical characterization of organic materials: raw animal manures, industrial residues, green manures and composts elaborated with coffee husk. With the objective to evaluated their decomposition, mineralization
Publicado em: 2006
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32. Utilização de fertilizantes orgânicos para indução de alimento natural no cultivo do camarão nativo Farfantepenaeus subtilis (Pérez-Farfante, 1967).
The marine shrimp Farfantepenaeus subtilis has a high potential for the aquaculture. However there are some feeding and nutrition problems in captivity, resulting in low growth and high feed conversion ratio. This work aimed to evaluate the natural food induction in F. subtilis culture, through different fertilization regimes. Were adopted four treatments an
Publicado em: 2006
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33. Phosphorus, bases, inorganic anions and organic acids leaching in soils treated with poultry litter / Lixiviação de fósforo, bases, ânions inorgânicos e ácidos orgânicos em solos tratados com camas de aviário
A utilização de dejetos de animais na agricultura cresce de maneira significativa a cada ano, devido, principalmente, à expansão da criação intensiva de animais, impulsionada pelo aumento das exportações. Com o decreto lei que proíbe a utilização dos dejetos de aves na alimentação animal, intensificou-se ainda mais o seu uso na agricultura. Por�
Publicado em: 2006
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34. Effect of the ingestion of chromium on the weight gain and of some sanguine representatives of bovine maintained in pastures in the savannah / Efeito da ingestão de cromo sobre o ganho de peso e de alguns constituintes sangüineos de bovinos mantidos em pastagens no cerrado
With the objective of to evaluate the performance of steers belonging to the groups racial Bos indicus (Nelore) and crossbreed Bos taurus (crossbreed holstein) in intensive grazing, during the dry (DS) and rainy stations (RS), with offer or not of organic chrome (OC) and of artificial shadow, 20 bovine of each racial group were distributed equally among the
Publicado em: 2005
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35. Phosphorus fractionation in plant materials exploiting procedures for sample preparation and monosegmented flow analysis / Fracionamento de fósforo em plantas empregando diferentes procedimentos de preparo de amostras e sistemas de análise em fluxo monossegmentado
In this work, different sample treatment procedures were evaluated for fractionation of phosphorous in plant material (determination of organic and inorganic, soluble and insoluble fractions). The evaluated procedures aimed the conversion of different fractions in ortophosphate, minimizing time, reagent amounts and waste generation. It was developed a monose
Publicado em: 2005
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36. Influence of vegetation cover on nutrient cycling in soil solution at the area of Manaus AM. / Influência da cobertura vegetal na ciclagem de nutrientes via solução do solo na região de Manaus - AM.
The main objective of this study was to contribute for the sustainability of land use in the central Amazon, evaluating the influence of vegetation cover on nutrient concentrations in soil solution that is, on the amounts of cations, anions and dissolved organic carbon (DOC). Using a primary forest as reference, we compared these concentrations with those in
Publicado em: 2005